linux/arch/sh/lib/ashlsi3.S

/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004, 2005, 2006
   Free Software Foundation, Inc.

This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
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later version.

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do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
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WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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!! libgcc routines for the Renesas / SuperH SH CPUs.
!! Contributed by Steve Chamberlain.
!! sac@cygnus.com

!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
!! recoded in assembly by Toshiyasu Morita
!! tm@netcom.com

/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
   ELF local label prefixes by J"orn Rennecke
   amylaar@cygnus.com  */

!
! __ashlsi3
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!
	.global	__ashlsi3
	
	.align	2
__ashlsi3:
	mov	#31,r0
	and	r0,r5
	mova	ashlsi3_table,r0
	mov.b	@(r0,r5),r5
#ifdef __sh1__
	add	r5,r0
	jmp	@r0
#else
	braf	r5
#endif
	mov	r4,r0

	.align	2
ashlsi3_table:
	.byte		ashlsi3_0-ashlsi3_table
	.byte		ashlsi3_1-ashlsi3_table
	.byte		ashlsi3_2-ashlsi3_table
	.byte		ashlsi3_3-ashlsi3_table
	.byte		ashlsi3_4-ashlsi3_table
	.byte		ashlsi3_5-ashlsi3_table
	.byte		ashlsi3_6-ashlsi3_table
	.byte		ashlsi3_7-ashlsi3_table
	.byte		ashlsi3_8-ashlsi3_table
	.byte		ashlsi3_9-ashlsi3_table
	.byte		ashlsi3_10-ashlsi3_table
	.byte		ashlsi3_11-ashlsi3_table
	.byte		ashlsi3_12-ashlsi3_table
	.byte		ashlsi3_13-ashlsi3_table
	.byte		ashlsi3_14-ashlsi3_table
	.byte		ashlsi3_15-ashlsi3_table
	.byte		ashlsi3_16-ashlsi3_table
	.byte		ashlsi3_17-ashlsi3_table
	.byte		ashlsi3_18-ashlsi3_table
	.byte		ashlsi3_19-ashlsi3_table
	.byte		ashlsi3_20-ashlsi3_table
	.byte		ashlsi3_21-ashlsi3_table
	.byte		ashlsi3_22-ashlsi3_table
	.byte		ashlsi3_23-ashlsi3_table
	.byte		ashlsi3_24-ashlsi3_table
	.byte		ashlsi3_25-ashlsi3_table
	.byte		ashlsi3_26-ashlsi3_table
	.byte		ashlsi3_27-ashlsi3_table
	.byte		ashlsi3_28-ashlsi3_table
	.byte		ashlsi3_29-ashlsi3_table
	.byte		ashlsi3_30-ashlsi3_table
	.byte		ashlsi3_31-ashlsi3_table

ashlsi3_6:
	shll2	r0
ashlsi3_4:
	shll2	r0
ashlsi3_2:
	rts
	shll2	r0

ashlsi3_7:
	shll2	r0
ashlsi3_5:
	shll2	r0
ashlsi3_3:
	shll2	r0
ashlsi3_1:
	rts
	shll	r0

ashlsi3_14:
	shll2	r0
ashlsi3_12:
	shll2	r0
ashlsi3_10:
	shll2	r0
ashlsi3_8:
	rts
	shll8	r0

ashlsi3_15:
	shll2	r0
ashlsi3_13:
	shll2	r0
ashlsi3_11:
	shll2	r0
ashlsi3_9:
	shll8	r0
	rts
	shll	r0

ashlsi3_22:
	shll2	r0
ashlsi3_20:
	shll2	r0
ashlsi3_18:
	shll2	r0
ashlsi3_16:
	rts
	shll16	r0

ashlsi3_23:
	shll2	r0
ashlsi3_21:
	shll2	r0
ashlsi3_19:
	shll2	r0
ashlsi3_17:
	shll16	r0
	rts
	shll	r0

ashlsi3_30:
	shll2	r0
ashlsi3_28:
	shll2	r0
ashlsi3_26:
	shll2	r0
ashlsi3_24:
	shll16	r0
	rts
	shll8	r0

ashlsi3_31:
	shll2	r0
ashlsi3_29:
	shll2	r0
ashlsi3_27:
	shll2	r0
ashlsi3_25:
	shll16	r0
	shll8	r0
	rts
	shll	r0

ashlsi3_0:
	rts
	nop